Illumination apparatus

Abstract

An illumination apparatus includes a reflective shell, a front cover, a light-emitting device, and a plurality of optical micro-structures. The front cover is connected to the reflective shell. A containing space is formed between the reflective shell and the front cover. The light-emitting device is disposed in the containing space and is configured to emit a light beam. The optical micro-structures are disposed on at least one of the reflective shell and the front cover. Each of the optical micro-structures is a multilayer stair-structure. The optical micro-structures diffuse the light beam by refraction and reflection.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of China application serial no. 201810153760.4, filed on Feb. 22, 2018. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of specification.BACKGROUNDTechnical Field[0002]The disclosure relates to an optical apparatus. More particularly, the disclosure relates to an illumination apparatus.Description of Related Art[0003]Nowadays, light-emitting diodes (LEDs) are gradually adopted as a light-emitting source for road illumination. The light-emitting diodes emit light through combining the electrons and the holes to convert electric energy into light energy rather than emit light through heating or discharging. Thus, the light-emitting diodes have advantages such as quick response speeds, small volumes, electricity saving, low pollution, and long life time and are suitable for mass production. As such, the light-emitting diodes graduall...

AI Technical Summary

Benefits of technology

[0005]The disclosure provides an illumination apparatus in which glare is suppressed and required illumination effect is achieved.

[0008]To sum up, in the illumination apparatus provided by the embodiments of the disclosure, the optical micro-structures featuring the multilayer stair-structures or the optical micro-structures featuring the stacked layers with at least part of the side surfaces not being aligned are adopted. Since the optical micro-structures may diffuse the light beam by refraction and reflection, glare is suppressed and required illumination effect is achieved.

Problems solved by technology

When the light-emitting diodes act as the light-emitting source for road illumination devices, problems such as severe glare caused by excessive concentration of light intensity may occur most of the time, which may easily lead to uncomfortable feeling in the eyes of the pedestrians and the drivers.

Consequently, energy waste is caused and insufficient light energy may be radiated on the road surface, and road regulations are not met as a result.

Therefore, how an illumination apparatus is designed in which required illumination effect is satisfied and glare is suppressed is an important issue for research and development.

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